1. Department
of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
2. Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
3. Process Research and Development, NMR Structure Elucidation Group, Merck & Co., Inc., 126 E Lincoln Avenue, Rahway, New Jersey 07065, United States
4. Departamento
de Química Fundamental, Universidade Federal de Pernambuco, Cidade Universitária, Recife, PE 50740-560, Brazil
5. Institute
of Organic Chemistry and Institute for Biological Interfaces Karlsruhe, Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany